<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>面试题2</title>
</head>
<body>
    <script type=text/javascript>
			setTimeout(() => {
				console.log(1);
			}, 0);
		Promise.resolve().then(() => {
			console.log(2);
		})
		Promise.resolve().then(() => {
			console.log(3);
		})
		console.log(4);
		</script>
    </script>    
</body>
</html>